JPH07264521A - Liquid crystal display system - Google Patents

Abstract

PURPOSE:To obtain a liquid crystal, display system capable of attachably/ detachably loading various sub-units, automatically judging the sort of a loaded sub-unit and executing display drive appropriate for the loaded sub-unit. CONSTITUTION:The liquid crystal display system is provided with a liquid crystal display unit 2 and plural sub-units 3 such as a tuner unit 3a and a game unit 3b to be attachably/detachably loaded to the unit 2 to supply at least display data. The unit 2 judges the sort of the loaded sub-unit by a control part and controls the drive of a liquid crystal display panel 11 through a driving circuit for a liquid crystal display part correspondingly to the sort of the sub- unit 3 concerned. Thereby various subunits 3 can be loaded to the unit 2, display drive appropriate for the loaded sub-unit 3 can be automatically executed and the unit 2 can be effectively utilized.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a liquid crystal display system.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal display device has been manufactured as a part of a liquid crystal television device, a liquid crystal game device or the like, that is, as an image display portion of a television device or a game device. It has a single function.

In a liquid crystal television device or a liquid crystal game device, the driving method and screen size of the liquid crystal display device are designed in order to properly display a television image or a game image. Manufactured exclusively for liquid crystal game devices.

[0004]

However, since such a conventional image display device is manufactured as a part of a liquid crystal television device or a liquid crystal game device, its driving method, screen size, and the like are different. The liquid crystal display device is manufactured exclusively for the liquid crystal television device and the liquid crystal game device, the liquid crystal display device cannot be used in common with various devices, and there is a problem that the usability of the liquid crystal display device is poor.

Therefore, according to the present invention, various units such as a tuner unit and a game unit can be removably attached to the liquid crystal display unit, and the type of the attached unit is automatically determined to be suitable for the unit. It is an object of the present invention to provide a liquid crystal display system that performs a display drive.

[0006]

A liquid crystal display system according to the present invention comprises a liquid crystal display unit, a plurality of types of receiving units detachably attached to the liquid crystal display unit for supplying at least display data, and an IC unit. In the liquid crystal display system, the liquid crystal display unit discriminates a liquid crystal display panel, a drive circuit for driving the liquid crystal display panel, the type of the mounted receiving unit or IC unit, and receives the signal. Unit or IC
The above object is achieved by including a control unit that controls driving of the liquid crystal display panel via the drive circuit according to the type of unit.

In this case, for example, as described in claim 2, one of the receiving units is a tuner unit for receiving a television radio wave, and the television data of a predetermined broadcasting system is received and the video data thereof is received. A receiver for outputting display data to the liquid crystal display unit as display data, and a drive controller for generating a display drive signal for driving the liquid crystal display unit based on the television radio wave received by the receiver.
May be provided.

Further, for example, as described in claim 3, the drive control unit thins out scanning lines of the liquid crystal display panel according to a specification of the liquid crystal display unit and a broadcasting system received by the receiving unit. A thinning-out processing unit for performing the above may be provided.

Further, for example, as described in claim 4, the IC unit is a game unit for storing a game program and display data of the game, and the control unit of the liquid crystal display unit has the IC unit as the control unit. When mounted, the drive circuit may be driven based on the game program of the game unit to display the display data of the game on the liquid crystal display panel.

[0010]

According to the liquid crystal display system of the present invention, the liquid crystal display system includes a liquid crystal display unit, a plurality of types of receiving units detachably attached to the liquid crystal display unit for supplying at least display data, an IC unit, The liquid crystal display unit is provided with a liquid crystal display through a drive circuit in accordance with the type of the receiving unit or the IC unit attached by the control unit, according to the type of the receiving unit or the IC unit. Since the panel is driven and controlled, it is possible to mount various receiving units or IC units on the liquid crystal display unit and automatically perform display driving suitable for the mounted receiving units or IC units. As a result, the liquid crystal display unit can be effectively used, and the usability of the liquid crystal display unit can be improved.

According to a second aspect of the present invention, one of the receiving units is a tuner unit for receiving at least television radio waves, and the receiving unit of the tuner unit comprises:
A display drive signal for receiving TV radio waves of a predetermined broadcasting system, outputting the video data as display data to the liquid crystal display unit, and driving the liquid crystal display unit based on the TV radio waves received by the drive control unit of the tuner unit. By generating a tuner unit of any broadcasting system in the liquid crystal display unit, it is possible to receive TV radio waves of any broadcasting system and display them properly on the liquid crystal display unit. It can be used as a television device.

Further, according to a third aspect of the present invention, the drive control section may perform thinning processing of scanning lines of the liquid crystal display panel according to the specifications of the liquid crystal display unit and the broadcasting system received by the receiving section. The display drive of the liquid crystal display unit, which is more suitable for the specifications of the liquid crystal display unit and the broadcasting system, can be performed, and the display performance can be improved.

Further, for example, as described in claim 4, the IC unit is a game unit for storing a game program and display data of the game, and the control unit of the liquid crystal display unit is mounted with the IC unit. When,
When the drive circuit is driven based on the game program of the game unit to display the display data of the game on the liquid crystal display panel, the liquid crystal display unit can easily display the game data. The system can be used as a liquid crystal game device.

[0014]

Embodiments Embodiments will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 to 3 are views showing a first embodiment of a liquid crystal display system of the present invention.

First, the structure will be described.

FIG. 1 is a system configuration diagram of a liquid crystal display system 1. The liquid crystal display system 1 includes a liquid crystal display unit 2 and a tuner unit (which is a detachable sub-unit 3 attached to the liquid crystal display unit 2). Receiving unit) 3a, game unit (IC unit) 3b, etc.,
It is composed of.

The liquid crystal display unit 2 has its body case 1
The liquid crystal display panel 11 is attached to the surface of 0,
On the lower surface of the liquid crystal display panel 11 on the surface of the main body case 10, a frequency display 1 showing the TV frequencies of VHF and UHF.
2 is displayed by printing or the like. Also, the main body case 1
A switch 13 for turning on / off the main power source of the liquid crystal display unit 2 is provided on the side surface of 0. Further, although not shown, a connector for connecting a controller (so-called joypad) for operating a game when the game unit 3b is connected to the side surface of the main body case 10, the tuner unit 3a and the game unit 3b.
A connector for connecting the subunits 3 such as the above is provided.

The tuner unit 3a has a band switching key 21 for switching the frequency band between VHF and UHF, a channel call key 22 for turning on / off the display of broadcast channels, and a down channel selection on the surface of the body case 20. Channel down key (DOWN)
23 and a channel up key (UP) 24 for increasing the selected channel are provided, and the main body case 20
A slide type rod antenna 25 is attached to the upper side surface of the. Further, a terminal portion 26 is attached to the lower side surface of the main body case 20, and the terminal portion 26 is attached.
Is detachably inserted into a connector (not shown) formed on the upper side surface of the liquid crystal display unit 2.

In the game unit 3b, a terminal portion 31 is attached to a lower side surface of a main body case 30. The terminal portion 31 is formed on an upper side surface of the liquid crystal display unit 2 and is provided on the tuner unit 3a. The terminal portion 26 is removably inserted into the same connector into which the terminal portion 26 is inserted.

That is, in the liquid crystal display unit 2, the terminal portion 26 of the tuner unit 3a which is the subunit 3 is formed.
By inserting the terminal portion 31 of the game unit 3b into the connector of the liquid crystal display unit 2, one of the tuner unit 3a or the game unit 3b can be selectively mounted,
The liquid crystal display unit 2 displays an image from the mounted subunit 3 on the panel 11, as described later.

The configuration of each unit will be sequentially described below.

As shown in FIG. 2, the liquid crystal display unit 2 includes a liquid crystal display section 40, a storage section 41, a control section 42, a power supply section 43, and the like. The liquid crystal display section 40 includes the liquid crystal display panel 11 and the liquid crystal display. Drive circuit 44 and liquid crystal type signal generator 4
It has 5 etc.

In FIG. 2, the operation unit 46 includes a power switch 13 of the liquid crystal display unit 2, a band switching key 21, a channel call key 22, a channel down key 23, a channel up key 24 and a liquid crystal display of the tuner unit 3a. The various keys of the controller connected to the unit 2 and other switches and keys of the subunit 3 connected to the liquid crystal display unit 2 are collectively referred to.

The liquid crystal display panel 11 has a plurality of scanning lines and data lines arranged in a matrix, and display elements such as liquid crystal capacitors are arranged at the intersections of the scanning lines and the data lines.

The liquid crystal drive circuit 44 includes a scanning side drive circuit (see FIG. 3) 50 and a data side drive circuit (see FIG. 3) 51.
The scanning side driving circuit 50 and the data side driving circuit 51 are provided with the liquid crystal display panel 11 from the control section 42.
Various display control signals and display data necessary for driving the liquid crystal display panel 11 are input, and various power supplies required for driving the liquid crystal display panel 11 are supplied from the power supply unit 43.

That is, the scanning side driving circuit 50 is based on the display control signal input from the control unit 42 and the power supply unit 43.
A scan driving voltage is generated from a power source supplied from the power source and is supplied to the liquid crystal display panel 11 to scan the scan line of the liquid crystal display panel 11. The data side drive circuit 51 includes a control unit 42.
Liquid crystal display panel 1 based on display data supplied from
A signal voltage is supplied to 1 to drive the liquid crystal display panel 11.

The liquid crystal type signal generation section 45 outputs the liquid crystal type signal MS corresponding to the type of the liquid crystal display section 40 to the control section 42.
Output to.

That is, the liquid crystal display section 40 is not limited to one type of the liquid crystal display panel 11 and the liquid crystal drive circuit 44, and various kinds of liquid crystal display panels 11 and the liquid crystal drive circuit 44 can be attached. For example, the liquid crystal display panel 11 is not limited to the number of scanning lines or data lines, and may have 220 scanning lines, 146 scanning lines, or any other number. As the liquid crystal drive circuit 44, one that sequentially drives one scan line, one that simultaneously drives two scan lines at the same time, one that sequentially drives three scan lines at the same time, and various other drives It may be a method. Then, the liquid crystal type signal generation unit 45 outputs the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 to the control unit 42.

The control section 42 discriminates the type of the liquid crystal display section 40 based on the liquid crystal type signal MS from the liquid crystal type signal generating section 45 of the liquid crystal display section 40, and a control signal suitable for the type of the liquid crystal display section 44. Is output to the liquid crystal drive circuit 44, and a liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 is output to the power source unit 43, so that the power source unit 43 drives the liquid crystal display unit 40 appropriately as described below. Turn on the power.

Further, the control section 42, as will be described later, receives the liquid crystal type signal MS from the liquid crystal type signal generating section 45.
Is output to the subunit 3.

Further, the control section 42 discriminates whether the sub-unit 3 is mounted or not mounted, and determines whether the mounted sub-unit 3 is the tuner unit 3a or the game unit 3b, or other sub-unit 3 Then, the operation control appropriate for the type of the mounted subunit 3 is performed. Whether the sub-unit 3 is mounted or not mounted may be determined by a switch that is turned on / off in accordance with the mounting / non-mounting of the sub-unit 3.
The determination may be made by exchanging signals with the sub-unit 3, and the determination method is not limited. Also, the installed subunit 3 is the tuner unit 3
The determination as to whether it is a, the game unit 3b, or the other subunit 3 may be a switch that is turned on / off depending on the type of the attached subunit 3, or the subunit 3 Signal between and
For example, the determination may be made by exchanging 2-bit signals,
The determination method is not limited.

The storage unit 41 is, for example, a ROM (Read Onl
y memory), RAM (Random Access Memory), etc., and stores a control program for controlling the drive of the liquid crystal display unit 2, system data, and the like, and is also used as a work memory for the control unit 42.

That is, the storage unit 41 includes the liquid crystal display unit 40.
Of the drive control method stored in the storage unit 41, the control unit 42 stores the liquid crystal type signal MS input from the liquid crystal type signal generation unit 45 among the drive control methods stored in the storage unit 41. The display control signal corresponding to the type of the liquid crystal type signal generating unit 45 is output to the liquid crystal drive circuit 44 based on the driving method corresponding to the liquid crystal type signal generating unit 45, and the power source unit 43 is notified of the type of the liquid crystal type signal generating unit 45. Driving power corresponding to the type of the signal generator 45 is supplied to the liquid crystal display unit 40.

Further, the storage unit 41 includes the liquid crystal display unit 2
The driving method of the liquid crystal display section 40 corresponding to the type of the mounted subunit 3 is stored in the storage unit 41.
The drive of the liquid crystal display unit 40 is controlled based on the drive method stored in the.

In particular, the storage unit 41 stores the game unit 3b.
Stores the control method of the game software when it is mounted on the liquid crystal display unit 2 and the driving method of the liquid crystal display unit 40 at that time. The control unit 42 mounts the game unit 3b on the liquid crystal display unit 2. Then, the game software data is read from the game unit 3b based on the control method of the game software stored in the storage unit 41, and the operation unit 46, particularly, the operation of the controller connected to the liquid crystal display unit 2 is handled. While performing the game process, the video data read from the game software is converted into display data and displayed on the liquid crystal display panel 11 based on the driving method of the liquid crystal display unit 40 at that time.

The power supply unit 43 generates various power supplies required for the operation of the liquid crystal display unit 2 from a power supply supplied from a battery or an external commercial power supply, supplies various power supplies to each unit of the liquid crystal display unit 2, and operates them. Various power supplies necessary for the unit 46 and the tuner unit 3 are supplied.

In particular, although not specifically shown, the power supply unit 43 is equipped with a power supply adjusting circuit for generating a required number of power supplies depending on the type of the liquid crystal display unit 40 and corresponds to the type of the liquid crystal display unit 40. The liquid crystal display unit 40 is provided with a selection circuit that selects a power source and supplies it to the liquid crystal display unit 40 based on the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 input from the control unit 42. The drive power thus generated is supplied to the liquid crystal display unit 40.

Next, the structure of the subunit 3 will be described.

First, the structure of the tuner unit 3a will be described.

The tuner unit 3a is, as shown in FIG. 3, a receiving circuit 6 for receiving TV radio waves and linearly processing them.
0 and a liquid crystal drive interface circuit (drive control section) 70 for driving the liquid crystal display unit 2.

The receiving circuit 60 includes a rod antenna 25, an electronic tuning tuner 61, a television linear circuit 62, and an A / D.
A conversion circuit 63, a data conversion circuit 64, a control circuit 65 and the like are provided.

The rod antenna 25 receives television radio waves and supplies the received radio waves to the electronic tuning tuner 61.

The electronic tuning tuner 61 includes a control circuit 65.
A designated channel is selected in accordance with a tuning signal input from, the desired television broadcast radio wave supplied from the rod antenna 25 is converted into an intermediate frequency signal, and the intermediate frequency signal is output to the television linear circuit 62.

The television linear circuit 62 is composed of an intermediate frequency amplification circuit, a video detection circuit, a video amplification circuit, an AFT detection circuit, a chroma circuit, etc., and converts the intermediate frequency signal input from the electronic tuning tuner 61 into the intermediate frequency signal. After amplification by the amplification circuit, AFT detection by the AFT detection circuit, image detection by the video detection circuit to extract the image signal, and further after the image signal output by the video detection circuit is amplified by the video amplification circuit , A / D conversion circuit 6
Output to 3. Further, the television linear circuit 62, with its chroma circuit, extracts a synchronization signal from the video signal and outputs it to the control circuit 65.

The audio signal separated by the television linear circuit 62 is sent to an audio circuit (not shown), and the audio circuit detects the audio and converts it into a low frequency signal, which is then output to the liquid crystal display unit 2. It The liquid crystal display unit 2 includes an amplifier circuit and a speaker (not shown), and outputs the audio signal input from the tuner unit 3a in a loud voice from the speaker.

The A / D conversion circuit 63 performs A / D (analog / digital) conversion (sampling) on the video signal input from the television linear circuit 62 based on the timing signal input from the control circuit 65, and data conversion. Output to the circuit 64.

The data conversion circuit 64 is the A / D conversion circuit 6
The digital video signal input from the circuit 3 is converted into a data format that can be driven by the data side drive circuit 51 of the liquid crystal display unit 2, and then output to the control unit 42 as display data.

That is, the data conversion circuit 64 sequentially reads, for example, the video signal input from the A / D conversion circuit 63 by the timing signal input from the control circuit 65, and after reading the video signal for one line, A gradation signal is created according to the video signal and is output to the liquid crystal display unit 2 as display data.

When the tuner unit 3a is attached to the liquid crystal display unit 2, the control section 42
Outputs the video signal (display data) from the tuner unit 3a and a display control signal described later to the scanning side driving circuit 50 and the data side driving circuit 51 of the liquid crystal display unit 40 as they are (through state).

Note that, in FIG. 3, for the sake of easy understanding, it is described that the display data is input from the data conversion circuit 64 of the tuner unit 3a to the data side drive circuit 51 of the liquid crystal display unit 40 of the liquid crystal display unit 2. There is.

The control circuit 65 separates the horizontal synchronizing signal φH and the vertical synchronizing signal φV contained in the video signal input from the television linear circuit 62, and outputs them to the liquid crystal drive interface circuit 70.

The liquid crystal drive interface circuit 70
Drive the liquid crystal display units 40 of different types.
A pair of vertical / horizontal direction control circuits 71 and 72 and two selection circuits 73 and 74 are provided, and the vertical / horizontal direction control circuits 71 and 72 respectively include a vertical direction control circuit 71a, a horizontal direction control circuit 71b, and a vertical direction control circuit 71b. It is composed of a direction control circuit 72a and a horizontal direction control circuit 72b.

The vertical synchronizing signal φV is supplied to the vertical control circuit 71a and the vertical control circuit 72a, respectively.
The horizontal synchronizing signal φH is input from the control circuit 65 of the receiving circuit 60 to the horizontal control circuit 71b and the horizontal control circuit 72b.

Vertical / horizontal control circuit 71 and vertical / horizontal
The horizontal direction control circuit 72 generates vertical and horizontal display control signals necessary to drive different types of liquid crystal display units 40, and a selection circuit 73 and a selection circuit 74.
Output to.

That is, the vertical direction control circuit 71a generates a vertical direction display control signal necessary to drive the liquid crystal display section 40 of a predetermined type and outputs it to the selection circuit 73, and the horizontal direction control circuit 71b A horizontal display control signal required to drive a predetermined type of liquid crystal display unit 40 is generated and output to the selection circuit 74. In addition, the vertical direction control circuit 72a
Generates a vertical display control signal necessary for driving a liquid crystal display unit 40 of a type different from that of the vertical control circuit 71a and outputs the vertical display control signal to the selection circuit 73.
b generates a horizontal display control signal required to drive the liquid crystal display unit 40 of a type different from that of the horizontal control circuit 71b, and outputs the horizontal display control signal to the selection circuit 74.

In particular, the horizontal control circuits 71b and 72b
Are a plurality of frequency dividing circuits for dividing a basic clock signal input from the control circuit 65 to generate a clock signal for generating a horizontal display control signal corresponding to a plurality of types of liquid crystal display panels 11. A selection circuit for selecting a clock signal suitable for the type of the liquid crystal display panel 11 from the clock signals output from the plurality of frequency dividing circuits is provided.

Although this selection circuit is not shown in FIG. 3,
A horizontal direction control circuit 71 is selected by selecting a clock signal corresponding to the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2.
b and 72b generate horizontal display control signals suitable for the type of the liquid crystal display panel 11.

That is, the horizontal display control signal needs to be supplied with the drive frequency changed according to the specifications of the liquid crystal display panel 11. For example, even in the case of TV radio waves of the same broadcasting system, the liquid crystal display panel 11 is supplied. 72 signal electrodes
In the case of 0 and 540, even though the repetition period of one horizontal synchronization period is the same, since the image information amount is different, it is necessary to speed up the drive frequency of the one having a larger number of signal electrodes.

Therefore, the horizontal control circuits 71b and 72b are provided.
Generates a horizontal display control signal suitable for the type of the liquid crystal display panel 11 by changing its driving frequency based on the clock signal suitable for the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS. .

A liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 is input from the control unit 42 of the liquid crystal display unit 2 to the selection circuit 74, and the selection circuit 74 is horizontally input from the horizontal direction control circuit 71b. Of the direction display control signal and the horizontal direction control signal input from the horizontal direction control circuit 72b, the liquid crystal display unit 4 of the type indicated by the liquid crystal type signal MS.
The horizontal display control signal corresponding to 0 is selectively selected and output to the control unit 42 of the liquid crystal display unit 2.

Further, the selection circuit 74 outputs the liquid crystal type signal MS inputted from the control section 42 to the selection circuit 73 as it is.

The selection circuit 73 has a vertical display control signal input from the vertical control circuit 71a based on the liquid crystal type signal MS input via the selection circuit 74, and a vertical display control signal input from the vertical control circuit 72a. The direction display control signal and the direction display control signal are selectively selected and output to the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 70 creates and selects a vertical display control signal and a horizontal display control signal corresponding to the two types of liquid crystal display sections 40 based on the horizontal synchronizing signal φH and the vertical synchronizing signal φV. Circuit 7
3 and 74, and the selection circuits 73 and 74 output the liquid crystal display section 4 based on the liquid crystal type signal MS from the liquid crystal display unit 2.
A display control signal corresponding to the type 0 is selected and output to the control unit 42 of the liquid crystal display unit 2.

Next, the structure of the game unit 3b will be described.

Although not shown in detail, the game unit 3b has, in the main body case 30, a memory for storing programs of various games, video data and sound effect data of the games, and a control section for controlling the operation of the memory. And the interface and the like, and the game program execution process is performed by the control unit 42 of the liquid crystal display unit 2 as described above.
Do.

Next, the operation of this embodiment will be described.

In the liquid crystal display system 1, various sub units 3 can be selectively attached to the liquid crystal display unit 2 in a detachable manner, and the liquid crystal display unit 2 automatically recognizes the type of the attached sub unit 3. Then, the liquid crystal display panel 11 is driven according to the mounted subunit 3.

Further, the liquid crystal display section 4 of the liquid crystal display unit 2
The number 0 is not limited to one type as described above, and various types (specifications) of the liquid crystal display unit 4 can be attached, and the liquid crystal display unit 2 is suitable for the type of the liquid crystal display unit 40. Drive.

That is, the liquid crystal display section 40 is provided with a liquid crystal type signal generating section 45, and the liquid crystal type signal generating section 45 is provided.
Outputs a liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 to the control unit 42 of the liquid crystal display unit 2.

The control section 42 carries out drive control suitable for the type of the liquid crystal display section 40 indicated by the liquid crystal type signal MS.

The liquid crystal display unit 2 has a connector (not shown) to which the subunit 3 is attached,
Each sub-unit 3 is, for example, as shown for the tuner unit 3a and the game unit 3b in FIG. 1, a terminal portion 2 for mounting on the liquid crystal display unit 2, respectively.
6 and 31 are provided.

Each sub-unit 3 includes the terminal portions 26, 3
1 is inserted into the connector of the liquid crystal display unit 2 to be attached to the liquid crystal display unit 2, and the control unit 42 of the liquid crystal display unit 2 switches between the sub unit 3 and the switch operation when the sub unit 3 is attached. By exchanging signals, it is determined which sub-unit 3 the mounted sub-unit 3 is, for example, the tuner unit 3a or the game unit 3b.

When the type of the mounted subunit 3 is discriminated, the controller 42 controls the driving of the liquid crystal display unit 40 according to the type of the subunit 3. When the game unit 3b is attached as the subunit 3, a controller for operating the game is connected to the connector.

That is, the liquid crystal display unit 2 has its controller 42 when the game unit 3b is mounted.
Reads the driving method of the game software and the driving method of the liquid crystal display section 40 corresponding to the game software stored in the storage section 41, reads the data of the game software from the game unit 3b, and reads the data of the game (operation section 46). The game progress process corresponding to the operation is performed, the video data read from the game unit 3b is converted into display data, and the liquid crystal display unit 40 suitable for the driving method corresponding to the type of the liquid crystal display unit 40 is driven, Also, the sound effect is output from the built-in speaker.

Further, in the liquid crystal display unit 2, as shown in FIG. 3, when the tuner unit 3a is attached, the control section 42 of the liquid crystal display unit 2 receives the display data and the display control signal input from the tuner unit 3a as they are (through). The output is provided to the scanning side drive circuit 50 and the data side drive circuit 51 of the liquid crystal display section 40. Further, as described above, the liquid crystal type signal MS from the liquid crystal type signal generation unit 45 of the liquid crystal display unit 40 is input to the control unit 42, and the control unit 42
The liquid crystal type signal MS is output to the selection circuit 74 of the tuner unit 3a.

The tuner unit 3a selects, from the television broadcast radio waves received by the rod antenna 25, the television broadcast radio waves of the designated channel with the electronic tuning tuner 61,
The signal is converted into an intermediate frequency signal and output to the television linear circuit 62. The television linear circuit 62 is an electronic tuning tuner 61.
After amplifying the intermediate frequency signal input from, the AFT detection or the video detection is performed, the image signal is extracted, amplified, and then output to the A / D conversion circuit 63. In addition, the television linear circuit 62 extracts the synchronization signal from the video signal,
Output to the control circuit 65.

The A / D conversion circuit 63 performs A / D conversion by sampling the video signal input from the television linear circuit 62 based on the timing signal input from the control circuit 65, and outputs it to the data conversion circuit 64. The data conversion circuit 64 converts the video signal input from the A / D conversion circuit 63 into a data format that can be driven by the liquid crystal display unit 40 of the liquid crystal display unit 2, and then outputs the display data of the liquid crystal display unit 2 as display data. Output to the control unit 42.

Further, the control circuit 65 separates the vertical synchronizing signal φV and the horizontal synchronizing signal φH from the synchronizing signal input from the television linear circuit 62, and controls the vertical direction control circuits 71a, 72a and the horizontal direction of the liquid crystal drive interface circuit 70. It outputs to the control circuits 71b and 72b.

Then, the vertical direction control circuit 71a generates a vertical direction display control signal necessary for driving the liquid crystal display section 40 of a predetermined type and outputs it to the selection circuit 73, and the horizontal direction control circuit 71b A horizontal display control signal required to drive a predetermined type of liquid crystal display unit 40 is generated and output to the selection circuit 74.

Further, the vertical direction control circuit 72a generates a vertical direction display control signal necessary for driving the liquid crystal display section 40 of a type different from that of the vertical direction control circuit 71a, and outputs it to the selection circuit 73, The horizontal direction control circuit 72b generates a horizontal direction display control signal necessary to drive the liquid crystal display unit 40 of a type different from that of the horizontal direction control circuit 71b,
Output to the selection circuit 74.

In particular, the horizontal control circuits 71b and 72b
Selects a clock signal suitable for the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2 to perform horizontal display control suitable for the type of the liquid crystal display panel 11. A signal is generated and output to the selection circuit 74.

The selection circuit 74 is a horizontal direction control circuit 71b.
Of the horizontal display control signal input from the horizontal display control signal and the horizontal display control signal input from the horizontal control circuit 72b.
The horizontal display control signal corresponding to the liquid crystal display unit 40 of the type indicated by the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2 is selectively selected, and then the control unit 42 of the liquid crystal display unit 2 is selected. Output.

Further, the selection circuit 73 has a vertical display control signal inputted from the vertical control circuit 71a based on the liquid crystal type signal MS inputted through the selection circuit 74,
The vertical display control signal input from the vertical control circuit 72a is selectively selected and output to the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 70 creates and selects a vertical display control signal and a horizontal display control signal corresponding to the two types of liquid crystal display units 40 based on the horizontal synchronizing signal φH and the vertical synchronizing signal φV. Circuit 7
3 and 74, and the selection circuits 73 and 74 output the liquid crystal display section 4 based on the liquid crystal type signal MS from the liquid crystal display unit 2.
A display control signal corresponding to the type 0 is selected and output to the control unit 42 of the liquid crystal display unit 2.

Then, the controller 42 of the liquid crystal display unit 2
When it is determined that the tuner unit 3a is attached to the liquid crystal display unit 2, the video signal (display data) and the display control signal from the tuner unit 3a are unchanged (in the through state) on the scanning side of the liquid crystal display unit 40. It outputs to the drive circuit 50 and the data side drive circuit 51.

The scanning side drive circuit 50 and the data side drive circuit 51 drive the liquid crystal display panel 11 for display based on the display data and the display control signal input via the control section 42.

Therefore, the liquid crystal display system 1 comprises a liquid crystal display unit 2 and a plurality of sub-units 3 which are detachably attached to the liquid crystal display unit 2 and supply at least display data. Control unit 4
2, the type of the mounted subunit 3 is discriminated, and the liquid crystal display unit 4 corresponding to the type of the subunit 3 is attached.
The liquid crystal display panel 11 is driven and controlled through the scan side drive circuit 50 and the data side drive circuit 51 of 0. As a result, by mounting various sub-units 3 on the liquid crystal display unit 2,
The display drive suitable for the mounted sub-unit 3 can be automatically performed, and the liquid crystal display unit 2 is effectively used,
The usability of the liquid crystal display unit 2 can be improved.

In addition, in this embodiment, 1 of the subunit 3 is used.
Is a tuner unit 3a that receives at least TV radio waves, and the receiving circuit 60 of the tuner unit 3a
Then, it receives TV radio waves of a predetermined broadcasting system and outputs the video data to the liquid crystal display unit 2 as display data,
A liquid crystal drive interface circuit (drive control unit) 70 of the tuner unit 3a generates a display drive signal for driving the liquid crystal display unit 2 based on the television radio waves received.

As a result, it is possible to receive a television wave of a predetermined broadcasting system and display it properly on the liquid crystal display unit 2, and the liquid crystal display system 1 can be used as a liquid crystal television device.

Further, in this embodiment, as one of the subunits 3, a game unit 3b for storing a game program (game software) and display data of the game is provided, and the control unit 42 of the liquid crystal display unit 2 is When the game unit 3b is attached as the subunit 3, the scanning side drive circuit 50 and the data side drive circuit 51 of the liquid crystal display unit 40 are driven based on the game software of the game unit 3b to display the display data of the game. Liquid crystal display panel 1
It is displayed in 1.

As a result, the game data can be easily displayed on the liquid crystal display unit 2, and the liquid crystal display system 1 can be used as a liquid crystal game device.

Further, according to the present embodiment, by incorporating the liquid crystal drive interface circuit 70 corresponding to a plurality of types of liquid crystal display units 40 into the tuner unit 3a, any liquid crystal display unit 40 can be incorporated into the liquid crystal display unit 2. The tuner unit 3a which can be incorporated can be manufactured at low cost, and the tuner unit 3a corresponding to a plurality of types of liquid crystal display units 40 can be manufactured. As a result, it is possible to improve the usability of the tuner unit 3a.

In the present embodiment, the case where the tuner unit 3a is provided with the liquid crystal drive interface circuit 70 corresponding to the two types of liquid crystal display section 4 has been described, but the liquid crystal corresponding to one type of liquid crystal display section 40 is described. It may be a drive interface circuit or a liquid crystal drive interface circuit corresponding to two or more types of liquid crystal display sections 40.

<Second Embodiment> In the above embodiments, the tuner unit 3a has the liquid crystal drive interface circuit 70 for generating control signals corresponding to the plurality of types of liquid crystal display sections 40. The drive interface circuit is not limited to this, and may include, for example, a vertical / horizontal direction control circuit compatible with a plurality of broadcasting systems.

That is, in this embodiment, the tuner unit automatically generates a display control signal corresponding to a plurality of broadcasting systems, and is applied to the same liquid crystal display system as in the first embodiment.

In the description of this embodiment, the same components as those in the first embodiment will be designated by the same reference numerals and the description thereof will be omitted.

FIG. 4 shows a liquid crystal display system 80 of this embodiment.
Is a diagram showing a liquid crystal display system 80 of the present embodiment,
A liquid crystal display unit 2 similar to the liquid crystal display system 1 of the first embodiment is provided, and a tuner unit 3c is provided.

The tuner unit 3c includes the receiving circuit 60.
And a liquid crystal drive interface circuit 81.

The receiving circuit 60 is the same as that shown in FIG. 3, and a detailed description thereof will be omitted, but the receiving circuit 60.
Usually has an electronic tuning tuner 61, a television linear circuit 62, etc., corresponding to one broadcasting system,
The control circuit 65 controls the reception circuit 6 when the reception circuit 60 is created.
Information on which broadcasting method 0 was created, that is, information on the receiving broadcasting method is stored in the internal memory.
Then, the control circuit 65 outputs a broadcast type signal BS indicating the reception broadcast system of the reception circuit 60 to the liquid crystal drive interface circuit 81.

As the broadcast type signal BS, for example, a 2-bit coded signal is used. For example, in binary number [11], NTSC system is [10], PAL system is [01]. Then, the SECAM system is displayed. It should be noted that the broadcast type signal BS is not limited to a 2-bit configuration, and for example, when there are two types of broadcasting systems, it may be a high / low 1-bit signal or with / without signal input. The broadcast system may be designated by.

The liquid crystal drive interface circuit 81 uses different broadcasting systems, in this embodiment, NTSC (Nati
onal Television System Commitee) system, PAL (Ph
asealternation by line) method and SECAM (Seque
3 sets of vertical / horizontal direction control circuits 82, 83, 84 corresponding to three types of broadcasting systems (ntial color and memory)
And two selection circuits 85 and 86, and the vertical / horizontal direction control circuits 82, 83 and 84 are NTSC respectively.
Vertical control circuit 82a for NTSC and horizontal control circuit 82b for NTSC, vertical control circuit 83a for PAL, horizontal control circuit 83b for PAL, vertical control circuit 84a for SECAM and horizontal control circuit 84b for SECAM. There is.

Vertical control circuit for NTSC 82a, PA
The L vertical control circuit 83a and the SECAM vertical control circuit 84a receive the vertical synchronizing signal φV, and the NTSC horizontal control circuit 82b, the PAL horizontal control circuit 83b, and the SECAM vertical control circuit 83b. The horizontal synchronizing signal φH is supplied to the receiving circuit 6 respectively.
It is input from the control circuit 65 of 0.

The NTSC vertical direction control circuit 82a and the NTSC horizontal direction control circuit 82b are the same as the control circuit 65.
When the broadcast type signal BS indicating that the receiving circuit 60 is the receiving circuit 60 of the NTSC system is input, the liquid crystal display unit 40 is driven based on the vertical synchronizing signal φV and the horizontal synchronizing signal φH for NTSC, respectively. A vertical display control signal and a horizontal display control signal suitable for, for example, a start pulse and a shift clock, and select circuit 85.
And output to the selection circuit 86.

Similarly, the PAL vertical direction control circuit 8 is also provided.
When the broadcast type signal BS indicating that the receiving circuit 60 is the receiving circuit 60 of the PAL system is input from the control circuit 65 of the receiving circuit 60, the horizontal direction control circuit 83b for 3a and the PAL horizontal control circuit 83b respectively receive vertical synchronization for PAL. A vertical display control signal and a horizontal display control signal suitable for driving the liquid crystal display unit 40 are generated based on the signal φV and the horizontal synchronization signal φH, and output to the selection circuits 85 and 86.

Similarly, the SECAM vertical direction control circuit 84a and the SECAM horizontal direction control circuit 84 are also provided.
b, when the broadcast type signal BS indicating that the receiving circuit 60 is the SECAM type receiving circuit 60 is input from the control circuit 65, the vertical synchronizing signal φV for SECAM is inputted.
Also, a vertical display control signal and a horizontal display control signal suitable for driving the liquid crystal display unit 40 are generated based on the horizontal synchronizing signal φH and output to the selection circuits 85 and 86.

Further, the horizontal control circuit 8 for NTSC is also provided.
2b, PAL horizontal direction control circuit 83b and SECAM
The horizontal control circuit 84b for frequency division divides the basic clock signal input from the control circuit 65 to generate a plurality of clock signals for generating horizontal display control signals corresponding to a plurality of types of liquid crystal display panels 11. A frequency divider circuit and a selection circuit for selecting a clock signal suitable for the type of the liquid crystal display panel 11 from the clock signals output from the plurality of frequency divider circuits are provided.

Although this selection circuit is not shown in FIG. 4,
A clock signal corresponding to the type of the liquid crystal display panel 11 is selected based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2, and each horizontal control circuit 82 is selected.
b, 83b and 84b generate horizontal display control signals suitable for the type of the liquid crystal display panel 11.

That is, it is necessary to supply the horizontal display control signal by changing the drive frequency according to the specifications of the liquid crystal display panel 11. For example, even if the television broadcast wave of the same broadcasting system is used, The number of signal electrodes is 720
In the case of the number of lines and the number of lines of the number of lines of 540, even though the repetition period of one horizontal synchronization period is the same, the amount of image information is different, so it is necessary to increase the drive frequency of the one having the larger number of signal electrodes.

Therefore, each horizontal direction control circuit 82b, 83
b and 84b generate a horizontal display control signal suitable for the type of the liquid crystal display panel 11 by changing the drive frequency based on the clock signal suitable for the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS. is doing.

That is, the vertical / horizontal direction control circuit 82,
The vertical / horizontal direction control circuit 83 and the vertical / horizontal direction control circuit 84 operate only when the broadcast type signal BS indicating its own broadcasting system is input from the control circuit 65, and the vertical direction display control signal and the horizontal direction display signal are displayed. The control signal is generated, and the generated vertical display control signal is output to the selection circuit 85 and the horizontal display control signal is output to the selection circuit 86.

The selection circuit 85 and the selection circuit 86 are, for example, composed of OR circuits, and are input from the vertical / horizontal direction control circuit 82, the vertical / horizontal direction control circuit 83, or the vertical / horizontal direction control circuit 84 which operates as described above. The vertical display control signal and the horizontal display control signal are output to the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 81 creates vertical and horizontal display control signals corresponding to the broadcasting system received by the receiving circuit 60 based on the horizontal synchronizing signal φH and the vertical synchronizing signal φV, and the selecting circuit 8
It outputs to the control part 42 of the liquid crystal display unit 2 via 5,86.

When the tuner unit 3c is attached to the liquid crystal display unit 2, the control section 42 accepts the display control signal input from the liquid crystal drive interface circuit 81 of the tuner unit 3c as it is, the scanning side drive circuit 50 and the data side drive circuit. Output to 51.

In FIG. 4, for the sake of clarity, the display control signal is output from the selection circuit 85 and the selection circuit 86 of the liquid crystal drive interface circuit 81 directly to the scanning side drive circuit 50 and the data side drive circuit 51. Have been described.

Next, the operation of this embodiment will be described.

In this embodiment, as in the first embodiment,
The receiving circuit 60 receives television radio waves of one predetermined broadcasting system, outputs the video data to the liquid crystal display unit 2, and outputs a display control signal corresponding to the broadcasting system received by the receiving circuit 60 to the liquid crystal drive interface circuit. It is generated at 81 and output to the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 81 has different broadcasting systems, NTSC system and PA system.
Three sets of vertical / horizontal direction control circuits 82, 83, 84 corresponding to the L system and the SECAM system, and two selection circuits 8
It is equipped with 4, 85. Each vertical / horizontal direction control circuit 82, 83, 84 operates only when the broadcast type signal BS indicating its own broadcasting system is input from the control circuit 65 to perform a vertical direction display control signal and a horizontal direction display control. A signal is generated, and the generated vertical display control signal is selected by the selection circuit 8
5, the horizontal display control signal is output to the selection circuit 86.

In particular, the horizontal control circuit 82 for NTSC
b, the PAL horizontal direction control circuit 83b and the SECAM horizontal direction control circuit 84b generate a clock signal suitable for the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2. A horizontal display control signal suitable for the type of the liquid crystal display panel 11 is selected and output to the selection circuit 86.

The selection circuit 85 and the selection circuit 86 are provided with a vertical display control signal and a horizontal display control signal input from the vertical / horizontal direction control circuit 82, the vertical / horizontal direction control circuit 83 or the vertical / horizontal direction control circuit 84 which are operated as described above. The display control signal is output to the control unit 42 of the liquid crystal display unit 2, and the scanning side drive circuit 50 and the data side drive circuit 51 drive the liquid crystal display panel 11.

Therefore, according to the present embodiment, as the tuner unit 3c, the receiving circuit 60 corresponding to an arbitrary broadcasting system is manufactured, and the liquid crystal drive interface circuit 81 corresponding to a plurality of broadcasting systems is incorporated, so that a plurality of units can be obtained. It is possible to manufacture the tuner unit 3c corresponding to the broadcasting system, and it is possible to manufacture the tuner unit 3c corresponding to a plurality of broadcasting systems at a low cost. Further, the control circuit 65 of the receiving circuit 60 outputs a broadcast type signal BS indicating the broadcasting system received by the receiving circuit 60 to the liquid crystal driving interface circuit 81, and the liquid crystal driving interface circuit 81 generates a display driving signal suitable for the broadcasting system. Since it is automatically generated, the usability of the tuner unit 3c can be improved.

In the present embodiment, the case where three broadcasting systems are supported has been described, but the types of broadcasting systems to be supported are not limited to the above three types, and the broadcasting systems to be supported are not limited to the above three types. The number is not limited to three.

<Third Embodiment> In the first embodiment, the tuner unit 3a includes a liquid crystal drive interface circuit 70 for generating control signals corresponding to a plurality of types of liquid crystal display sections 40. In the above, the case where the liquid crystal drive interface circuit 81 corresponding to a plurality of broadcasting systems is provided has been described, but the liquid crystal drive interface circuit is not limited to these.
For example, a liquid crystal display unit 40 of a plurality of types and a vertical / horizontal direction control circuit compatible with a plurality of broadcasting systems may be provided.

In this embodiment, the tuner unit corresponds to a plurality of types of liquid crystal display sections 40 and generates display control signals corresponding to a plurality of broadcasting systems, and the same liquid crystal display as in the above embodiments. It is applied to the system.

In the description of this embodiment, the same components as those in the first embodiment will be designated by the same reference numerals and the description thereof will be omitted.

FIG. 5 shows a liquid crystal display system 90 of this embodiment.
Is a diagram showing a liquid crystal display system 90 of the present embodiment,
A liquid crystal display unit 2 similar to the liquid crystal display system of the first embodiment is provided, and a tuner unit 3d is provided.

The tuner unit 3d comprises a receiving circuit 60 and a liquid crystal drive interface circuit 91 similar to those in the first and second embodiments.

The receiving circuit 60 is the same as that shown in FIG. 3 and its detailed description is omitted.
Usually has an electronic tuning tuner 61, a television linear circuit 62, etc., corresponding to one broadcasting system,
The control circuit 65 controls the reception circuit 6 when the reception circuit 60 is created.
Information on which broadcasting method 0 was created, that is, information on the receiving broadcasting method is stored in the internal memory. Then, the control circuit 65 sends the broadcast type signal BS indicating the receiving broadcast system of the receiving circuit 60 to the liquid crystal drive interface circuit 8
Output to 1.

The liquid crystal drive interface circuit 91
Drive the liquid crystal display units 40 of different types.
A set of vertical / horizontal direction control circuits 92, 93, 94 and two selection circuits 95, 96 are provided, and the vertical / horizontal direction control circuits 92, 93, 94 respectively have different broadcasting systems,
In this embodiment, the NTSC (National Television System)
Commitee) method, PAL (Phase alternation by lin)
e) Method and SECAM (Sequential color and memor)
y) NTSC / PAL with built-in vertical control circuit and horizontal control circuit for 3 types of broadcasting system
/ SECAM vertical direction control circuit 92a and NTSC / P
Horizontal control circuit 92b for AL / SECAM, NTSC
/ PAL / SECAM vertical direction control circuit 93a and NT
SC / PAL / SECAM horizontal direction control circuit 93b and NTSC / PAL / SECAM vertical direction control circuit 9
4a and an NTSC / PAL / SECAM horizontal direction control circuit 94b.

NTSC / PAL / SECAM vertical direction control circuit 92a, NTSC / PAL / SECAM vertical direction control circuit 93a and NTSC / PAL / SECAM.
The vertical control circuit 94a for NTSC system,
It has a built-in vertical direction control circuit compatible with the three PAL and SECAM broadcasting systems.
/ PAL / SECAM horizontal direction control circuit 92b, NT
SC / PAL / SECAM horizontal direction control circuit 93b and NTSC / PAL / SECAM horizontal direction control circuit 9
4b has a built-in horizontal direction control circuit corresponding to each of the above three broadcasting systems.

Then, the vertical control circuit 92a for NTSC / PAL / SECAM, NTSC / PAL / SECA
Horizontal control circuit 92b for M, NTSC / PAL / SE
Vertical control circuit 93a for CAM, NTSC / PAL /
Horizontal direction control circuit 93b for SECAM, NTSC / PA
Vertical direction control circuit 94a and NTSC for L / SECAM
/ PAL / SECAM horizontal direction control circuit 94b,
From the control circuit 65 of the receiving circuit 60, the broadcast type signal BS indicating the receiving broadcast system of the receiving circuit 60 is input. The broadcast type signal BS is the same as in the case of the second embodiment.

The vertical control circuit 92a for each NTSC / PAL / SECAM, NTSC / PAL / SECA.
Vertical control circuit 93a for M and NTSC / PAL / S
A vertical synchronizing signal φV is inputted to the vertical direction control circuit 94a for ECAM from the control circuit 65 of the receiving circuit,
The horizontal synchronizing signal φH of the receiving circuit 60 is supplied to the NTSC / PAL / SECAM horizontal direction control circuit 92b, the NTSC / PAL / SECAM horizontal direction control circuit 93b, and the NTSC / PAL / SECAM horizontal direction control circuit 94b. It is input from the control circuit 65.

When the broadcast type signal BS is input, the NTSC / PAL / SECAM vertical direction control circuit 92a and the NTSC / PAL / SECAM horizontal direction control circuit 92b correspond to the broadcast system designated by the broadcast type signal BS. The vertical direction control circuit and the horizontal direction control circuit are operated to drive the liquid crystal display unit 40 of a predetermined type based on the vertical synchronization signal φV and the horizontal synchronization signal φH for the broadcasting system input from the control circuit 65. A vertical display control signal and a horizontal display control signal, such as a start pulse and a shift clock, which are suitable for the vertical display control signal and the horizontal display control signal to the selection circuit 95 and the selection circuit 96, respectively. Output.

Similarly, the above NTSC / PAL / SECA
Vertical control circuit 93a for M and NTSC / PAL / S
When the broadcast type signal BS is input from the control circuit 65, the ECAM horizontal direction control circuit 93b receives the broadcast type signal BS.
By operating the vertical direction control circuit and the horizontal direction control circuit of the broadcasting system specified by, the vertical synchronization signal φV and the horizontal synchronization signal φH for the broadcasting system input from the control circuit 65 are input.
A vertical display control signal and a horizontal direction suitable for driving a liquid crystal display unit 40 of a different type from the vertical control circuit 92a for NTSC / PAL / SECAM and the horizontal control circuit 92b for NTSC / PAL / SECAM based on A display control signal is generated and the selection circuit 95 and the selection circuit 9 are generated.
Output to 6.

Similarly, the above NTSC / PAL / S
Vertical control circuit 94a for ECAM and NTSC / PA
When the broadcast type signal BS is input from the control circuit 65, the L / SECAM horizontal direction control circuit 94b operates the vertical direction control circuit and the horizontal direction control circuit of the broadcasting system designated by the broadcast type signal BS to control them. A vertical direction control circuit 92a for NTSC / PAL / SECAM, a horizontal direction control circuit 92b for NTSC / PAL / SECAM, and an NTSC / PAL based on the vertical synchronizing signal φV and the horizontal synchronizing signal φH for the broadcasting system input from the circuit 65. / SECA
Vertical control circuit 93a for M and NTSC / PAL / S
A vertical display control signal and a horizontal display control signal suitable for driving the liquid crystal display unit 40 of a type different from that of the ECAM horizontal control circuit 93b are generated, and the selection circuit 95 is generated.
And output to the selection circuit 96.

In particular, the NTSC / PAL / SECAM horizontal direction control circuits 92b, 93b and 94b are the control circuit 6
5, a plurality of frequency dividing circuits that generate a clock signal for generating a horizontal display control signal corresponding to a plurality of types of liquid crystal display panels 11 by dividing the basic clock signal input from the reference numeral 5. A selection circuit is provided for selecting a clock signal suitable for the type of the liquid crystal display panel 11 from the clock signals output from the circuit.

Although this selection circuit is not shown in FIG. 3,
The clock signal corresponding to the type of the liquid crystal display panel 11 is selected based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2, and NTSC / PAL / SE is selected.
The CAM horizontal control circuits 92b, 93b, 94b generate horizontal display control signals suitable for the type of the liquid crystal display panel 11.

That is, it is necessary to supply the horizontal display control signal by changing the drive frequency according to the specifications of the liquid crystal display panel 11. For example, even in the case of TV radio waves of the same broadcasting system, the liquid crystal display panel 11 is used. 72 signal electrodes
In the case of 0 and 540, even though the repetition period of one horizontal synchronization period is the same, since the image information amount is different, it is necessary to speed up the drive frequency of the one having a larger number of signal electrodes.

Therefore, the NTSC / PAL / SECAM horizontal direction control circuits 92b, 93b and 94b change their driving frequencies based on the clock signal suitable for the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS. ,
A horizontal display control signal suitable for the type of the liquid crystal display panel 11 is generated.

The vertical / horizontal direction control circuit 92, the vertical / horizontal direction control circuit 93, and the vertical / horizontal direction control circuit 94 respectively include a vertical direction control circuit and a vertical direction control circuit corresponding to the broadcast type signal BS input from the control circuit 65. The horizontal control circuit is operated to operate the liquid crystal display units 40 of different types.
A vertical direction display control signal and a horizontal direction display control signal suitable for driving, and the generated vertical direction display control signal to the selection circuit 95 and the horizontal direction display control signal to the selection circuit 96.
Output to.

The selection circuits 95 and 96 are, for example, formed by a multiplexer as in the first embodiment, and based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2, One of the vertical display control signal and the horizontal display control signal input from each of the vertical / horizontal direction control circuits 92, 93 and 94 is selectively selected and output to the control unit 42 of the liquid crystal display unit 2. To do.

That is, the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 is input to the selection circuit 96 from the control unit 42 of the liquid crystal display unit 2, and the selection circuit 96 is based on the liquid crystal type signal MS. , NTSC / PAL / S
Horizontal control circuit 92b for ECAM, NTSC / PAL
/ SECAM horizontal direction control circuit 93b and NTSC /
Of the horizontal display control signals input from the horizontal control circuit 94b for PAL / SECAM, the liquid crystal type signal MS
One of the horizontal display control signals corresponding to the type of the liquid crystal display unit 40 designated by is selected and output to the control unit 42 of the liquid crystal display unit 2.

Further, the selection circuit 96 outputs the liquid crystal type signal MS inputted from the control section 42 as it is to the selection circuit 95.

The selection circuit 95 selects the NTSC / PA based on the liquid crystal type signal MS input through the selection circuit 96.
Vertical control circuit 92a for L / SECAM, NTSC /
Vertical control circuit 93a and NT for PAL / SECAM
Among the vertical display control signals input from the vertical control circuit 94a for SC / PAL / SECAM, one of the vertical display control signals corresponding to the type of the liquid crystal display unit 40 designated by the liquid crystal type signal MS is selected. To the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 91 uses the vertical synchronizing signal φV and the horizontal synchronizing signal φH input from the control circuit 65 of the receiving circuit 60 to determine the vertical direction corresponding to the type of the broadcasting system of the receiving circuit 60. The control circuit and the horizontal control circuit are operated to generate vertical display control signals and horizontal display control signals corresponding to the three types of liquid crystal display sections 40, and the selection circuits 95 and 96 are selected.
And the liquid crystal type signal MS from the liquid crystal display unit 2
Based on the above, the display control signal corresponding to the type of the liquid crystal display unit 40 is selected by the selection circuits 95 and 96 and output to the control unit 42 of the liquid crystal display unit 2.

When the tuner unit 3d is attached to the liquid crystal display unit 2, the control unit 42 receives the display control signal input from the liquid crystal drive interface circuit 91 of the tuner unit 3d as it is, the scanning side drive circuit 50 and the data side drive circuit. Output to 51.

In FIG. 5, for the sake of clarity, the display control signal is output from the selection circuit 95 and the selection circuit 96 of the liquid crystal drive interface circuit 91 directly to the scanning side drive circuit 50 and the data side drive circuit 51. Have been described.

Next, the operation of this embodiment will be described.

In this embodiment, as in the first embodiment,
The receiving circuit 60 receives TV radio waves of one predetermined broadcasting system, outputs the video data to the liquid crystal display unit 2, and corresponds to the broadcasting system received by the receiving circuit 60, and the type of the liquid crystal display unit 40. The display control signal corresponding to is generated by the liquid crystal drive interface circuit 91,
Output to the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 91 includes three sets of vertical / horizontal direction control circuits 92, 93, 94 for driving the liquid crystal display sections 40 of different types, and each vertical / horizontal direction control circuit 92. , 93, 94
Is a NTSC / P with a built-in vertical direction control circuit and horizontal direction control circuit corresponding to different broadcasting systems, that is, NTSC system, PAL system and SECAM system.
Vertical control circuit 92a for AL / SECAM and NTSC
/ PAL / SECAM horizontal direction control circuit 92b, NT
Vertical control circuit 93a for SC / PAL / SECAM and horizontal control circuit 93 for NTSC / PAL / SECAM
b and an NTSC / PAL / SECAM vertical direction control circuit 94a and an NTSC / PAL / SECAM horizontal direction control circuit 94b.

The vertical / horizontal direction control circuit 92, the vertical / horizontal direction control circuit 93, and the vertical / horizontal direction control circuit 94 respectively include a vertical direction control circuit and a vertical direction control circuit corresponding to the broadcast type signal BS input from the control circuit 65. The horizontal control circuit is operated to operate the liquid crystal display units 40 of different types.
A vertical direction display control signal and a horizontal direction display control signal suitable for driving, and the generated vertical direction display control signal to the selection circuit 95 and the horizontal direction display control signal to the selection circuit 96.
Output to.

In particular, the NTSC / PAL / SECAM horizontal direction control circuits 92b, 93b and 94b are used for the liquid crystal type signal MS inputted from the control section 42 of the liquid crystal display unit 2.
A clock signal suitable for the type of the liquid crystal display panel 11 is selected based on the above, and a horizontal display control signal suitable for the type of the liquid crystal display panel 11 is generated and output to the selection circuit 96.

The selection circuits 95 and 96 are based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2, and the vertical / horizontal direction control circuits 9 are selected.
One of the vertical display control signal and the horizontal display control signal input from 2, 93, and 94 is selectively selected and output to the control unit 42 of the liquid crystal display unit 2.

Therefore, the liquid crystal drive interface circuit 91, based on the synchronizing signal input from the control circuit 65 of the receiving circuit 60, has a vertical direction control circuit and a horizontal direction control circuit corresponding to the type of the broadcasting system of the receiving circuit 60. Are operated to generate vertical display control signals and horizontal display control signals corresponding to the three types of liquid crystal display units 40, and output them to the selection circuits 95 and 96. Then, based on the liquid crystal type signal MS from the liquid crystal display unit 2, the selection circuits 95 and 96 select a display control signal corresponding to the type of the liquid crystal display unit 40 and output it to the control unit 42 of the liquid crystal display unit 2.

As described above, according to the present embodiment, as the tuner unit 3d, the receiving circuit 60 corresponding to an arbitrary broadcasting system is manufactured to correspond to a plurality of broadcasting systems and to the plurality of liquid crystal display portions 40. By incorporating the corresponding liquid crystal drive interface circuit 91, an arbitrary liquid crystal display unit 40 can be incorporated in the liquid crystal display unit 2, and the tuner unit 3d corresponding to a plurality of broadcasting systems can be manufactured. Liquid crystal display unit 4
Tuner unit 3d that supports 0 and multiple broadcasting systems
Can be manufactured at low cost. As a result, the usability of the tuner unit 3d can be improved.

In the present embodiment, the case where three broadcasting systems and three types of liquid crystal display sections 40 are supported has been described, but the types and the number of broadcasting systems and the types and the number of liquid crystal display sections are as follows. It goes without saying that it is not limited to the above.

<Fourth Embodiment> This embodiment is an embodiment for thinning scanning lines.

When there is a difference in the number of scanning lines between the television broadcasting system and the driving method of the liquid crystal display section and the configuration of the liquid crystal display section, it becomes necessary to thin out the scanning lines.

Therefore, in this embodiment, the tuner unit thins out the scanning lines.

This embodiment is applied to a liquid crystal display system similar to that of the first embodiment. In the description of this embodiment, the same components as those of the first embodiment are designated by the same reference numerals. And its description is omitted.

FIG. 6 shows a liquid crystal display system 10 of this embodiment.
It is a figure showing 0, and is a liquid crystal display system 100 of this example.
Includes a liquid crystal display unit 2 similar to the liquid crystal display system of the first embodiment, and a tuner unit 3e.

The tuner unit 3e includes the receiving circuit 60 and the liquid crystal drive interface circuit 101 similar to those in the first embodiment.

The receiving circuit 60 is the same as that shown in FIG. 3, and a detailed description thereof will be omitted.
Usually has an electronic tuning tuner 61, a television linear circuit 62, etc., corresponding to one broadcasting system,
The control circuit 65 controls the reception circuit 6 when the reception circuit 60 is created.
Information on which broadcasting method 0 was created, that is, information on the receiving broadcasting method is stored in the internal memory. Then, the control circuit 65 sends the broadcast type signal BS indicating the receiving broadcast system of the receiving circuit 60 to the liquid crystal drive interface circuit 1.
Output to 01.

The control circuit 65 is provided with a sync separation circuit 65a and a basic clock generation circuit 65b as shown in FIG.

A sync signal is input to the sync separation circuit 65a from the television linear circuit 62, and the sync separation circuit 65a generates a vertical sync signal φV and a horizontal sync signal φH from the sync signal to produce a liquid crystal drive interface. Output to the circuit 101.

The basic clock generation circuit 65b also generates a basic clock signal for synchronizing the operation of the liquid crystal drive interface circuit 101, which will be described later, and outputs it to the liquid crystal drive interface circuit 101.

The liquid crystal drive interface circuit 101
As shown in FIG. 6, the liquid crystal drive interface circuit 101 includes a horizontal direction control circuit 102, a vertical direction control circuit 103, a mode selection circuit 104, and the like, and the liquid crystal drive interface circuit 101 includes a control circuit 65 of the reception circuit 60, particularly a sync separation circuit 65a. A vertical display control signal and a horizontal display control signal which correspond to the broadcasting system received by the receiving circuit 60 based on the horizontal synchronizing signal φH and the vertical synchronizing signal φV input from Then, the data is output to the control unit 42 of the liquid crystal display unit 2 via the mode selection circuit 104.

When the tuner unit 3e is attached to the liquid crystal display unit 2, the control section 42 of the liquid crystal display unit 22 receives the display control signal inputted from the liquid crystal drive interface circuit 101 of the tuner unit 3e as it is, and the scanning side drive circuit 50. And to the data side drive circuit 51.

In FIG. 6, the mode selection circuit 10 of the liquid crystal drive interface circuit 101 is shown for the sake of clarity.
4 to the direct scanning side drive circuit 50 and the data side drive circuit 5
1 describes that a display control signal is output.

The above liquid crystal drive interface circuit 101
As described above, includes a horizontal direction control circuit 102, a vertical direction control circuit 103, and a mode selection circuit 104, the details of which are configured as shown in FIG.

That is, the horizontal control circuit 102
The vertical direction control circuit 103 includes an NB signal generation circuit 111, an STB signal generation circuit 112, a clock generation circuit 113, and the like.
14a, PAL mode CNB signal generation circuit 114b, N
TSC mode CDB signal creation circuit 115a, PAL mode CDB signal creation circuit 115b, NTSC mode CFB
Signal generation circuit 116a, PAL mode CFB signal generation circuit 116b, NTSC mode drive timing control circuit 117a, PAL mode drive timing control circuit 117
b is provided.

First, the horizontal direction control circuit 102 will be described.

The horizontal control circuit 102 divides the basic clock signal input from the control circuit 65 and drives the plurality of types of liquid crystal display panels 11 in the same manner as the horizontal control circuits of the above embodiments. A plurality of frequency dividing circuits for generating a clock signal for generating a horizontal control signal corresponding to the type such as the frequency and a clock signal suitable for the type of the liquid crystal display panel 11 based on the clock signals output from the plurality of frequency dividing circuits. Although not shown in FIGS. 6 and 7, the selection circuit for selecting the liquid crystal display panel is selected based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2. The clock signal corresponding to the type 11 is selected and output to the SNB signal generation circuit 111, the STB signal generation circuit 112, and the clock generation circuit 113.

The SNB signal generation circuit 111 is connected to the control circuit 6
5 and the horizontal direction control circuit 1
The SNB signal is generated based on the clock signal input from the selection circuit in 02 and output to the mode selection circuit 104. The SNB signal generated by the SNB signal generation circuit 111 is a so-called segment control signal. From the data conversion circuit 64 to the control unit 4 of the liquid crystal display unit 40.
The display data input to the data side drive circuit 51 via 2 is sequentially latched by the data side drive circuit 51, and a data signal corresponding to the stored display data is transmitted to the liquid crystal display panel 11
Is a signal to be output to.

The STB signal generation circuit 112 is composed of the control circuit 6
5 and the horizontal direction control circuit 1
The STB signal is generated based on the clock signal input from the selection circuit in 02 and output to the mode selection circuit 104. The STB signal generated by the STB signal generation circuit 112 is displayed by the data side drive circuit 51. This is a sampling start signal for starting data latch, that is, sampling of display data.

The clock generation circuit 113 has a two-phase basic clock signal CK1 for the data side drive circuit 51 based on the basic clock and the synchronization signal input from the control circuit 65 via the selection circuit in the horizontal direction control circuit 102. , CK
2 is generated and output to the mode selection circuit 104.

Next, the vertical control circuit 103 will be described.

The NTSC mode CNB signal generation circuit 114a and the PAL mode CNB signal generation circuit 114b of the vertical direction control circuit 103 sequentially scan the liquid crystal display unit 2 with scanning signals based on the synchronization signal input from the control circuit 65. CN of NTSC system and PAL system for sequentially shifting and transferring scanning signals in the side drive circuit 50
B signal is generated, and NTSC mode CDB signal generation circuit 1
15a and the PAL mode CDB signal generation circuit 115b and the mode selection circuit 104.

NTSC mode CDB signal generation circuit 115
a and the PAL mode CDB signal generation circuit 115b is
CNB input from the TSC mode CNB signal generation circuit 114a and the PAL mode CNB signal generation circuit 114b
A CDB signal that determines the scan line start timing and the scan line selection width in the NTSC mode and the PAL mode is generated based on the signal, and is output to the mode selection circuit 104. This NTSC mode CDB creation circuit 115a
The PAL mode CDB signal creation circuit 115b creates timing pulses for three scanning lines.

NTSC mode CDB signal generation circuit 115
The a and PAL mode CDB signal generation circuit 115b particularly generates a CDB signal which has been subjected to scan line thinning processing and outputs it to the mode selection circuit 104.

That is, the NTSC mode CDB signal generation circuit 115a shifts the CDB signal by one line between the odd line and the even line which are adjacent to each other, and shifts the CDB signal by one line between the odd line and the even line. Shifts by 3 lines, and the mode selection circuit 1
Output to 04. Specifically, the NTSC mode CDB signal creation circuit 115a reads the CDB signal at the rising edge of the CNB signal shown in FIG. 8 and shifts at the falling edge of the CNB signal.

PAL mode CDB signal generation circuit 115b
Shifts the CDB signal by two lines between the odd line and the even line which are adjacent to each other, and shifts the CDB signal by two lines between the odd line and the even line which sandwich one scanning line.
It is shifted by 4 lines and output to the mode selection circuit 104. Specifically, the PAL mode CDB signal generation circuit 11
5b reads the CDB signal at the rising edge of the CNB signal shown in FIG. 9 and shifts at the falling edge of the CNB signal.

NTSC mode CFB signal generation circuit 116
The a and PAL mode CFB signal generating circuit 116b inverts the scanning signal for each one scanning (1H) period based on the synchronization signal input from the control circuit 65, and operates in the NTSC mode or the PAL mode for AC driving the liquid crystal. A CFB signal (inversion control signal) is generated and output to the mode selection circuit 104.

NTSC mode drive timing control circuit 1
17a and PAL mode drive timing control circuit 117
Reference numeral b denotes a shift register or the like, which generates signals of NTSC system and PAL system for controlling the timing of each horizontal control signal in the scanning side drive circuit 50 of the liquid crystal display panel 2 and outputs them to the mode selection circuit 104. To do.

The mode selection circuit 104 receives the horizontal display control signal from each circuit of the horizontal control circuit 102,
Further, the vertical display control signals of both the NTSC system and the PAL system are input from each circuit of the vertical direction control circuit 103, and the type of the broadcasting system received by the receiving circuit 60 from the control circuit 65 of the receiving circuit 60 is selected. The broadcast type signal BS shown is input, and the mode selection circuit 104 indicates the broadcast type signal BS among the vertical display control signals of the NTSC system and the PAL system input from the horizontal direction control circuit 102 and the vertical direction control circuit 103. A display control signal of a system corresponding to the broadcasting system is selected and output to the control unit 42 of the liquid crystal display unit 2.

Next, the operation of this embodiment will be described.

In the present embodiment, as described above, the horizontal direction control circuit 102 uses the clock signal corresponding to the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2. Is selected, a horizontal display control signal suitable for the type of the liquid crystal display panel 11 is generated and output to the mode selection circuit 104.

That is, the SNB signal generation circuits 111, S
TB signal generation circuit 112 and clock generation circuit 113
Is an SN suitable for the type of the liquid crystal display panel 11 based on the synchronization signal and the clock signal input from the control circuit 65.
B signal, STB signal and two-phase basic clock signal CK
The horizontal display control signals of 1 and CK2 are generated and output to the mode selection circuit 104.

Also, the type of broadcasting system and the liquid crystal display panel 1
Depending on the type of 1, it is necessary to perform thinning processing of scanning lines.

Hereinafter, the case where the broadcasting system is the NTSC system and the case where the broadcasting system is the PAL system will be described separately.

First, the case where the broadcasting system is NTSC will be described.

When the broadcasting system is the NTSC system, the number of scanning lines in one field is 525.
Although the number of scanning lines is 5, the actual number of scanning lines is about 220 after subtracting about 40 which is the number of vertical blanking periods.

When displaying this NTSC video,
If the number of scanning lines of the liquid crystal display panel 11 of a certain type of liquid crystal display unit 40 is 220, it is not necessary to thin out the liquid crystal display unit 40, but another type of liquid crystal display unit 40 is attached. If the number of scanning lines of the panel 11 is, for example, 146, it is necessary to perform thinning scanning for 74 scanning lines obtained by subtracting 146 from 220.

Therefore, in the present embodiment, the vertical scanning circuit 103 thins out the horizontal scanning lines.

In the case of the NTSC system, if 220 of the scanning lines are divided by 74 which is the number of scanning lines that need to be thinned out,
It becomes about 3, and when thinning out at a ratio of 1 to 3 scanning lines, N
220 TSC scanning lines can be appropriately displayed on the liquid crystal display panel 11 having 146 scanning lines.

That is, the vertical direction control circuit 103 is the same as the NTSC mode CNB signal generation circuit 114a shown in FIG.
The CNB signal shown in (1) is generated, and the NTSC mode CDB signal generation circuit 115a generates a CDB signal that determines the scanning line start timing and the selection width of the scanning line in the NTSC mode. This CDB signal is, as shown in FIG.
It is a timing pulse for the scanning line (for 3H).

NTSC mode CDB signal generation circuit 115
a is a mode in which the CDB signal is shifted by one line between adjacent odd lines and even lines, and is shifted by three lines between odd lines or even lines sandwiching one scanning line. Output to the selection circuit 104.

NTSC mode CFB signal generation circuit 116
As described above, a generates the CFB signal (inversion control signal) and outputs it to the mode selection circuit 104, and the NTSC mode drive timing control circuit 117a generates a timing control signal and outputs it to the mode selection circuit 104. To do.

When the broadcast type signal BS indicating the NTSC system is input from the control circuit 65, the mode selection circuit 104 receives the horizontal direction such as the SNB signal or the STB signal input from the horizontal direction control circuit 102. The display control signal is output to the liquid crystal display panel 2 and each signal generation circuit 11 of the NTSC mode system of the vertical direction control circuit 103.
4a, 115a, 116a and C which is a vertical display control signal input from the drive timing control circuit 117a.
The NB signal, CDB signal, CFB signal and timing control signal are selected and output to the liquid crystal display unit 2.

The horizontal display control signal and the vertical display control signal are output to the scanning side drive circuit 50 and the data side drive circuit 51 via the control section 42 of the liquid crystal display unit 2, and the scanning side drive circuit 50 scans the scanning lines. The liquid crystal display panel 11 is driven by the data signal from the data side drive circuit 51 in the state where thinning is performed for every three lines.

That is, the CDB signal is now NTSC.
The mode CDB signal generation circuit 115a shifts one line between the odd line and the even line adjacent to each other, and shifts three lines between the odd line and the even line sandwiching one scanning line. Therefore, as shown in FIG. 8, scanning drive signals X1 to Xn
Is thinned out every three lines.

FIG. 8 shows a state in which V2 is the center voltage of the scan drive signal, VDD is a high voltage, V4 is a low voltage, and an AC voltage scan drive signal is applied.
Of these, the shaded portions are thinned lines.

That is, for example, 5 of the horizontal synchronizing signal φH
The sixth line indicates that the scanning drive signal X3 is thinned out of the scanning drive signals X1, X2, and X3, and the sixth line indicates that the scanning drive signals X2, X2 have been skipped.
3 and X4, the scanning drive signal X4 is thinned out.

Therefore, when the receiving circuit 60 of the tuner unit 3e receives the television radio wave of the NTSC broadcasting system, and when the liquid crystal display panel 11 has 146 scanning lines, one of 220 scanning lines is required. The screen data is sent to the vertical control circuit 103 in the NTSC mode CDB.
By performing thinning-out processing for thinning out the scanning lines at a rate of one in three in the signal generating circuit 115a, the liquid crystal display panel 11 of 146 scanning lines can be appropriately driven and displayed.

Next, the case where the broadcasting system is the PAL system will be described.

When the broadcast system is the PAL system, the number of scanning lines in one field is 625 divided by 2 to 312.5.
However, the actual number of scanning lines is about 272 after subtracting about 40 which is the number of vertical blanking periods.

When displaying the image of the PAL system, if the number of the scanning lines of the liquid crystal display panel 11 of the liquid crystal display unit 40 of a certain type is 272, it is not necessary to thin out, but the liquid crystal display unit 40 is different. The number of scanning lines of the liquid crystal display panel 11 is
For example, if there are 220 lines, it is necessary to perform thinning-out scanning for 52 scanning lines obtained by subtracting 220 lines from 272 lines.
That is, if 272 lines are divided by 52 lines, it is necessary to perform thinning-out scanning at a ratio of 1 line to 5 lines.

When the number of scanning lines of the liquid crystal display panel 11 is 146, it is necessary to thin out 126 scanning lines obtained by subtracting 146 from 272. Now, assuming that the number of scanning lines of the liquid crystal display panel 11 is 146, it is necessary to thin out every two lines.

Therefore, in the present embodiment, thinning is performed at a rate of one for every two scanning lines (actually, a rate of two for four scanning lines).

That is, if 272 lines are divided by 126 lines,
It becomes about 2, and when thinning out at a ratio of 2 to 4 scan lines, P
272 scanning lines of the AL system can be appropriately displayed on the liquid crystal display panel 11 having 146 scanning lines.

That is, in the vertical direction control circuit 103, the PAL mode CNB signal generation circuit 114b generates the CNB signal shown in FIG. 9, and the PAL mode CDB signal generation circuit 115b generates the PAL mode scan line start timing and scan. A CDB signal that determines the line selection width is generated and output to the mode selection circuit 104. The CDB signal is a timing pulse for four scanning lines (4H) as shown in FIG.

That is, the PAL mode CDB signal generation circuit 115b shifts the CDB signal by two lines between the odd line and the even line which are adjacent to each other, and shifts the CDB signal between the odd line and the even line sandwiching one scanning line. Is shifted by 4 lines and output to the mode selection circuit 104.

PAL mode CFB signal generation circuit 116b
As described above, the CFB signal (inversion control signal) is generated and output to the mode selection circuit 104, and the PAL mode drive timing control circuit 117b generates the timing control signal and output to the mode selection circuit 104. To do.

Then, the mode selection circuit 104 causes the control circuit 65 to send the broadcast type signal B indicating the PAL system.
When S is input, the horizontal display control signals such as the SNB signal and the STB signal input from the horizontal control circuit 102 are output to the liquid crystal display panel 2, and each signal of the PAL mode system of the vertical control circuit 103 is output. Creating circuit 114
b, 115b, 116b and drive timing control circuit 1
The CNB signal, the CDB signal, the CFB signal and the timing control signal which are the vertical display control signals of the PAL mode input from 17b are selected and output to the liquid crystal display unit 2.

The horizontal display control signal and the vertical display control signal are output to the scan side drive circuit 50 and the data side drive circuit 51 via the control section 42 of the liquid crystal display unit 2, and the scan side drive circuit 50 is scanned. The liquid crystal display panel 1 is driven by the data signal from the data side drive circuit 51 while the drive circuit 50 thins out every four scan lines.
Drive 1

Then, the CDB signal is the PAL mode CD
The B signal generation circuit 115b shifts by 2 lines between the odd line and the even line which are adjacent to each other.
Since four lines are shifted between odd lines or even lines sandwiching one scanning line, as shown in FIG. 9, the scanning drive signals X1 to Xn are interleaved every four lines. Has been pulled.

That is, in FIG. 9, V2 is the center voltage of the scan drive signal, VDD is a high voltage, and V4 is a low voltage.
The figure shows a state in which a scan drive signal of an AC voltage is applied, and among these, the hatched portions are thinned lines.

Specifically, for example, in the seventh and eighth lines of the horizontal synchronizing signal φH, the scan drive signals X1 and X are provided.
Of 2, 2, X3, and X4, the scanning drive signal X3 and the scanning drive signal X4 are thinned out.

Therefore, the receiving circuit 60 of the tuner unit 3e receives TV radio waves of the PAL broadcasting system, and the scanning line of the liquid crystal display panel 11 is 1
When the number of lines is 46, the PAL of the vertical direction control circuit 103
2 in 4 lines by the mode CDB signal generation circuit 115b
It is possible to perform the thinning-out process at the line ratio and drive it appropriately.

As described above, in this embodiment, the liquid crystal drive interface circuit 101 controls the liquid crystal display unit 2, particularly the liquid crystal display panel according to the type (specification) of the liquid crystal display unit 40 and the broadcasting system received by the receiving unit. Since the eleven scanning lines are thinned out, the display drive more suitable for the specifications of the liquid crystal display unit 11 and the broadcasting system can be performed, and the display performance can be improved.

In this embodiment, the broadcasting system is N
There are two types of the TSC system and the PAL system, and the thinning process when the number of scanning lines of the liquid crystal display panel 11 is 146 in the two types of broadcasting systems has been described. The type of the liquid crystal display panel 11 is not limited to those of 146 scanning lines and those of sequentially driving the scanning lines.

<Fifth Embodiment> This embodiment is an embodiment in which the driving method of the liquid crystal display panel is switched, and the driving method is selected according to the number of scanning lines of the liquid crystal display panel of the liquid crystal display section to obtain the contrast. Is an example of adjusting

Therefore, in this embodiment, the tuner unit is provided with a circuit for driving the liquid crystal by a plurality of driving methods, and the contrast is adjusted by selecting the driving method.

This embodiment is applied to a liquid crystal display system similar to that of the first embodiment. In the description of this embodiment, the same components as those of the first embodiment will be described.
The same reference numerals are given and the description thereof is omitted.

FIG. 10 shows a liquid crystal display system 1 of this embodiment.
20 is a view showing a liquid crystal display system 12 of the present embodiment.
No. 0 is equipped with a liquid crystal display unit 2 similar to the liquid crystal display system of the first embodiment, and a tuner unit 3f
Is equipped with.

The tuner unit 3f includes the receiving circuit 60 and the liquid crystal drive interface circuit 121 similar to those in the first embodiment.

The receiving circuit 60 is the same as that shown in FIG. 3, and a detailed description thereof will be omitted.
Usually has an electronic tuning tuner 61, a television linear circuit 62, etc., corresponding to one broadcasting system,
The control circuit 65 of the receiving circuit 60 generates the vertical synchronizing signal φV and the horizontal synchronizing signal φH as described above, and outputs them to the interface circuit 121.

The liquid crystal drive interface circuit 121
10, includes a horizontal direction control circuit 122, a vertical direction control circuit 123, a mode selection circuit 124, and the like. The mode selection circuit 124 includes a liquid crystal type signal from the control unit 42 of the liquid crystal display unit 2. MS is entered.

The liquid crystal drive interface circuit 121
The horizontal direction control circuit 122, as shown in FIG.
SNB signal creation circuit 131, STB signal creation circuit 132
And a clock generation circuit 133, and the vertical direction control circuit 123 includes a CNB signal generation circuit 134 and a frequency division CDB.
A signal generation circuit 135 and a CFB signal generation circuit 136 are provided.

The horizontal control circuit 102 is the same as the horizontal control circuit of the fourth embodiment, and divides the basic clock signal input from the control circuit 65 to correspond to a plurality of types of liquid crystal display panels 11. A plurality of frequency dividing circuits for generating a clock signal for generating a horizontal display control signal, and a clock signal suitable for the type of the liquid crystal display panel 11 are selected from the clock signals output by the plurality of frequency dividing circuits. It has a selection circuit.

Although not shown in FIGS. 10 and 11, this selection circuit is based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2 and the liquid crystal display panel 11 is selected.
The clock signal corresponding to the type is selected and output to the SNB signal creation circuit 131, the STB signal creation circuit 132, and the clock creation circuit 133.

Configurations of the SNB signal creation circuit 131, the STB signal creation circuit 132 and the clock creation circuit 133,
The operation is the same as that of the above-mentioned fourth embodiment, so a detailed description thereof will be omitted.

The CNB signal generating circuit 134 of the vertical direction control circuit 123 has a predetermined broadcasting system, for example, NTS, based on the synchronization signal input from the control circuit 65.
The C-system scan signal is sequentially shifted in the scan-side drive circuit 50 of the liquid crystal display unit 2 to generate a CNB signal for transferring the scan signal, which is output to the divided CDB signal generation circuit 135 and the mode selection circuit 124. Output to.

The frequency division CDB signal generation circuit 135 is shown in FIG.
As shown in, the frequency dividing circuit 137 and the CDB signal generating circuit 1
CDB signal for driving one line (hereinafter referred to as 1α mode CDB signal), CDB signal for simultaneously driving two lines (hereinafter referred to as 2α mode CDB signal), and CDB for simultaneously driving three lines. Signal (hereinafter,
It is called a 3α mode CDB signal. ) Is generated.

That is, the frequency dividing circuit 137 is composed of, for example, a timing synchronizing circuit and two frequency dividing circuits. The timing synchronizing circuit includes a horizontal synchronizing signal φH and a clock from the control circuit 65 of the receiving circuit 60. The pulse φ is input. The timing synchronization circuit uses the horizontal synchronization signal φ
Based on H and the clock pulse φ, a timing pulse corresponding to one scanning (1H) period is generated, and the frequency dividing circuit and C
It is output to the DB signal creation circuit 138. One of the frequency dividing circuits divides the timing pulse corresponding to 1H input from the timing synchronizing circuit to generate a timing pulse corresponding to 2H, and the other frequency dividing circuit and the CDB signal generating circuit 138 are provided. Output. The other frequency dividing circuit divides the timing pulse corresponding to 2H input from the first frequency dividing circuit to generate a timing pulse corresponding to 3H and outputs the timing pulse to the CDB signal generation circuit 138.

The CDB signal generation circuit 138 is composed of three CDs.
Each of the CDB signal generating circuits includes a timing pulse corresponding to the 1H period, a timing pulse corresponding to the 2H period, and a timing pulse corresponding to 3H input from the frequency dividing circuit 137. As shown in FIG. 12, a 1α mode CD that drives one line
A B signal, a 2α mode CDB signal that simultaneously drives two lines, and a 3α mode CDB signal that simultaneously drives three lines are generated and output to the mode selection circuit 124.

The CDB signal is a signal for generating a scanning signal, and is a signal for determining the scanning start timing of the scanning line and the selection width of the scanning line.

The vertical synchronizing signal φV and the horizontal synchronizing signal φH are input from the control circuit 65 of the receiving circuit 60 to the CFB signal generating circuit 136 of the vertical direction control circuit 123,
The CFB signal generation circuit 136 outputs C from these synchronization signals.
The FB signal is generated and output to the mode selection circuit 124. This CFB signal is an inversion signal for alternating the frame and alternating-current driving the liquid crystal.

The mode selection circuit 124 is formed of, for example, a multiplexer, and the mode selection circuit 124 includes an SNB signal, an STB signal, and a clock signal C which are horizontal display control signals from the horizontal direction control circuit 122.
K1 and CK2 are input, CNB signals, CDB signals, and CFB signals that are vertical display control signals from the vertical control circuit 123 are input, and the liquid crystal type from the control unit 42 of the liquid crystal display unit 2 is input. Signal MS
Has been entered.

Particularly, from the CDB signal generation circuit 138 of the vertical direction control circuit 123, the 1α mode CDB signal, 2α mode
The mode CDB signal and the 3α mode CDB signal are input to the mode selection circuit 124.

The mode selection circuit 124 uses the liquid crystal type signal M
One of the three types of CDB signals is selected by S and the vertical display control signal and the horizontal display control signal are output to the control unit 42 of the liquid crystal display unit 2.

That is, in the mode selection circuit 124, the control section 42 of the liquid crystal display unit 2 to the liquid crystal display section 40 is connected.
The liquid crystal type signal MS indicating the type of the driving method is input,
The mode selection circuit 124 selects one of the 1α mode CDB signal, the 2α mode CDB signal, and the 3α mode CDB signal based on the liquid crystal type signal MS, and selects the vertical display control signal and the horizontal display control signal. Is output to the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 121 generates CDB signals of three driving methods based on the synchronization signal input from the control circuit 65 of the receiving circuit 60, and the liquid crystal input from the liquid crystal display unit 2. Based on the type signal MS, a CDB signal suitable for the driving method of the liquid crystal display unit 40 is selected, and a control unit of the liquid crystal display unit 2 is selected as a vertical display control signal and a horizontal display control signal suitable for the liquid crystal display unit 40. To 42.

When the tuner unit 3f is attached to the liquid crystal display unit 2, the control section 42 receives the display control signal input from the liquid crystal drive interface circuit 121 of the tuner unit 3f as it is, the scanning side drive circuit 50 and the data side drive circuit. Output to 51.

Note that, in FIG. 10 and FIG. 11, for easy understanding, the display control signal is output from the mode selection circuit 124 of the liquid crystal drive interface circuit 121 directly to the scan side drive circuit 50 and the data side drive circuit 51. Have been described.

Next, the operation of this embodiment will be described.

In the liquid crystal display system 120 of the present embodiment, the receiving circuit 60 of the tuner unit 3f receives the television broadcast radio wave of the predetermined broadcasting system and the display data is outputted from the data converting circuit 64, as in the above-mentioned respective embodiments. Is output to the control unit 42 of the liquid crystal display unit 2. Further, the control circuit 65 outputs a synchronizing signal to the horizontal direction control circuit 122 and the vertical direction control circuit 123 of the liquid crystal drive interface circuit 121.

The horizontal direction control circuit 122 uses a driving method suitable for the type of the liquid crystal display unit 40 of the liquid crystal display unit 2 based on the synchronizing signal input from the control circuit 65, as in the fourth embodiment. A horizontal display control signal is generated and output to the liquid crystal display unit 2.

Further, the vertical direction control circuit 123 generates a vertical display control signal by a driving method suitable for the type of the liquid crystal display section 40 of the liquid crystal display unit 2 based on the synchronization signal input from the control circuit 65, Output to the liquid crystal display unit 2.

That is, the horizontal direction control circuit 122, as described above, is based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2, and the liquid crystal display panel 11 is operated.
, A horizontal control signal suitable for the type of the liquid crystal display panel 11 is generated and output to the mode selection circuit 104.

That is, the SNB signal generation circuits 131, S
TB signal creation circuit 132 and clock creation circuit 133
Is an SN suitable for the type of the liquid crystal display panel 11 based on the synchronization signal and the clock signal input from the control circuit 65.
B signal, STB signal and two-phase basic clock signal CK
1, a horizontal control signal of CK2 is generated, and a mode selection circuit 1
To 24.

The vertical direction control circuit 123 is similar to that shown in FIG.
As shown in FIG.
A signal is generated and output to the divided CDB signal generation circuit 135 and the mode selection circuit 124, and the divided CDB signal generation circuit 1
35 generates a 1α mode CDB signal, a 2α mode CDB signal, and a 3α mode CDB signal, and outputs them to the mode selection circuit 124. The CFB signal generation circuit 136 generates a CFB signal from the synchronization signal input from the control circuit 65 and outputs the CFB signal to the mode selection circuit 124.

That is, the divided CDB signal generation circuit 135
Includes a frequency dividing circuit 137 and a CDB signal generating circuit 138. The frequency dividing circuit 137 generates a timing pulse corresponding to one scanning (1H) period, a timing pulse corresponding to 2H, and a timing pulse corresponding to 3H. It is generated and output to the CDB signal generation circuit 138.

As shown in FIG. 12, the CDB signal generating circuit 138 drives 1 line from the timing pulse corresponding to the 1H period input from the frequency dividing circuit 137, 1α.
A mode CDB signal is generated from a timing pulse corresponding to a 2H period, a 2α mode CDB signal that simultaneously drives two lines, and a timing pulse corresponding to a 3H period is generated a 3α mode CDB signal that simultaneously drives three lines. , To the mode selection circuit 124.

The CDB signal is a signal for generating a scanning signal, and is a signal for determining the scanning start timing of the scanning line and the selection width of the scanning line.

The mode selection circuit 124 has three types of CDBs input from the CDB signal generation circuit 138 based on the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 input from the control unit 42 of the liquid crystal display unit 2. One of the signals is selected and output to the control unit 42 of the liquid crystal display unit 2 as a vertical display control signal, and the horizontal display control signal input from the horizontal control circuit 122 is controlled by the liquid crystal display unit 2. It is output to the unit 42.

That is, the liquid crystal drive interface circuit 121 generates CDB signals of three types of drive methods based on the synchronization signal input from the control circuit 65 of the receiving circuit 60, and the liquid crystal input from the liquid crystal display unit 2. Based on the type signal MS, a CDB signal suitable for the driving method of the liquid crystal display unit 40 is selected, and a control unit of the liquid crystal display unit 2 is selected as a vertical display control signal and a horizontal display control signal suitable for the liquid crystal display unit 40. To 42.

Therefore, in the liquid crystal drive interface circuit 121, the liquid crystal display section 40 of the liquid crystal display unit 2 is
In the α driving method, the 1α mode CDB signal is selected and output to the control unit 42 of the liquid crystal display panel 2, and the control unit 4
2 outputs a vertical direction control signal and a horizontal direction display control signal including the 1α mode CDB signal to the liquid crystal display unit 40. As a result, the liquid crystal display panel 11 of the liquid crystal display unit 40.
As shown in FIG. 12, the scan lines are driven line by line by the scan drive signals X1 to Xn based on the 1α mode CDB signal, and so-called 1α drive is performed.

Further, the liquid crystal drive interface circuit 12
When the liquid crystal display unit 40 of the liquid crystal display unit 2 is in the 2α driving method, 1 selects the 2α mode CDB signal and outputs it to the control unit 42 of the liquid crystal display panel 2, and the control unit 42
The vertical control signal and the horizontal display control signal including the 2α mode CDB signal are output to the liquid crystal display unit 40. As a result, the liquid crystal display panel 11 of the liquid crystal display unit 40 is
As shown in FIG. 2, based on the 2α-mode CDB signal, the scanning lines are driven by two lines by the scanning drive signals X1 to Xn, so-called 2α driving is performed.

Further, the liquid crystal drive interface circuit 1
Reference numeral 21 is for selecting the 3α mode CDB signal when the liquid crystal display unit 40 of the liquid crystal display unit 2 is in the 3α driving method,
Output to the control unit 42 of the liquid crystal display panel 2, and the control unit 42
Outputs the vertical control signal and the horizontal display control signal including the 3α mode CDB signal to the liquid crystal display unit 40. As a result, the liquid crystal display panel 11 of the liquid crystal display unit 40.
As shown in FIG. 12, the scanning lines are driven by the scanning drive signals X1 to Xn in units of three lines based on the 3α mode CDB signal, and so-called 3α driving is performed.

Therefore, the liquid crystal display unit 40 of the liquid crystal display unit 2 can be driven appropriately according to the type, in particular, the driving method, and the contrast of the liquid crystal display panel 11 can be made appropriate.

In addition, in the fifth embodiment, the liquid crystal display unit 2, particularly the control section 42 of the liquid crystal display unit 2 is used.
Although the CDB signal suitable for the driving method of the liquid crystal display unit 40 is selected based on the liquid crystal type signal MS from, the present invention is not limited to this. For example, as shown by a broken line in FIG. The mode selection switch 125 is provided in 3f, and the mode selection switch 125
You may make it switch manually suitably. By doing so, the driving method of the liquid crystal display unit 40 can be appropriately switched, and the contrast of the liquid crystal display panel 11 of the liquid crystal display unit 2 can be appropriately adjusted.

In the fifth embodiment, the case of switching between 1α driving, 2α driving and 3α driving has been described, but the driving method of the liquid crystal display section 40 is not limited to these, and the liquid crystal driving is not limited thereto. The interface circuit 121 may include a horizontal direction control circuit and a vertical direction control circuit corresponding to the plurality of driving methods.

Furthermore, in the fifth embodiment, the liquid crystal drive interface circuit 121 corresponds to one broadcasting system, ie, the horizontal direction control circuit 122 and the vertical direction control circuit 1.
Although the description has been given of the case of including 23, a vertical and horizontal direction control circuit that generates vertical and horizontal display control signals corresponding to a plurality of driving methods corresponding to a plurality of broadcasting systems may be provided.

Although the invention made by the present inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in each of the above embodiments, the tuner unit is provided with the liquid crystal drive interface circuit for performing the drive suitable for the type of the display section 40 of the liquid crystal display unit 2, but the present invention is not limited to this, and for example, The liquid crystal display unit 2 may be provided with the liquid crystal drive interface circuit described in each of the above embodiments.

[0267]

According to the liquid crystal display system of the present invention, it is provided with a liquid crystal display unit, a plurality of types of receiving units detachably attached to the liquid crystal display unit and supplying at least display data, and an IC unit. The liquid crystal display unit determines the type of the attached receiving unit or the IC unit by the control unit,
Alternatively, the liquid crystal display panel is driven and controlled via a drive circuit according to the type of IC unit.

Therefore, it is possible to mount various receiving units or IC units on the liquid crystal display unit and automatically perform display driving suitable for the mounted receiving units or IC units.

As a result, the liquid crystal display unit can be effectively used, and the usability of the liquid crystal display unit can be improved.

[0270] Further, as described in claim 2, one of the receiving units is a tuner unit for receiving at least television radio waves, and the receiving unit of the tuner unit comprises:
A display drive signal for receiving TV radio waves of any broadcasting system, outputting the video data to the liquid crystal display unit as display data, and driving the liquid crystal display unit based on the TV radio waves received by the drive control section of the tuner unit. As a result, the liquid crystal display system can be used as a liquid crystal television device by receiving a television radio wave of an arbitrary broadcasting system and appropriately displaying it on the liquid crystal display unit.

Further, as described in claim 3, the drive control unit performs the thinning process of the scanning lines of the liquid crystal display panel according to the specifications of the liquid crystal display unit and the broadcasting system received by the receiving unit. Therefore, it is possible to drive the display of the liquid crystal display unit, which is more suitable for the specifications of the liquid crystal display unit and the broadcasting system, and it is possible to improve the display performance.

Further, as described in claim 4, the IC unit is a game unit for storing a game program and display data of the game, and when the control unit of the liquid crystal display unit is mounted with the IC unit, By driving the drive circuit based on the game program of the game unit to display the display data of the game on the liquid crystal display panel, it is possible to easily display the game data on the liquid crystal display unit. It can be used as a game device.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a first embodiment of a liquid crystal display system of the present invention.

FIG. 2 is a circuit block diagram of the liquid crystal display unit of FIG.

3 is a circuit block diagram of the tuner unit and the liquid crystal display unit of FIG.

FIG. 4 is a circuit block diagram of a tuner unit and a liquid crystal display unit of a second embodiment of the liquid crystal display system of the present invention.

FIG. 5 is a circuit block diagram of a tuner unit and a liquid crystal display unit of a third embodiment of the liquid crystal display system of the present invention.

FIG. 6 is a circuit block diagram of a tuner unit and a liquid crystal display unit of a fourth embodiment of the liquid crystal display system of the present invention.

7 is a detailed circuit block diagram of the liquid crystal drive interface circuit of FIG.

FIG. 8 is a timing chart of each signal when scanning lines are thinned out at a rate of one in three lines.

FIG. 9 is a timing chart of each signal when scanning lines are thinned out at a ratio of two to four.

FIG. 10 is a circuit block diagram of a tuner unit and a liquid crystal display unit of a fifth embodiment of the liquid crystal display system of the present invention.

11 is a detailed circuit block diagram of the liquid crystal drive interface circuit and the liquid crystal display panel of FIG.

FIG. 12 is a timing chart of signals when 1α driving, 2α driving, and 3α driving are performed.

[Explanation of symbols]

1, 80, 90, 100, 120 Liquid crystal display system 2 Liquid crystal display unit 3 Sub units 3a, 3b to 3f Tuner unit 3b Game unit 10 Main body case 11 Liquid crystal display panel 25 Rod antenna 26, 31 Terminal portion 40 Liquid crystal display portion 41 Storage Part 42 Control part 43 Power supply part 44 Liquid crystal drive circuit 45 Liquid crystal type signal generation part 46 Operation part 50 Scan side drive circuit 51 Data side drive circuit 60 Reception circuit 61 Electronic tuning tuner 62 Television linear circuit 63 A / D conversion circuit 64 Data conversion Circuit 65 Control circuit 70, 81, 91, 101, 121 Liquid crystal drive interface circuit 71, 72, 82-84, 92-94, 103, 10
4, 122 vertical / horizontal direction control circuits 71a, 72a, 82a to 84a, 92a to 94a, 1
31 vertical direction control circuit 71b, 72b, 82b to 84b, 92b to 94b horizontal direction control circuit 73, 74, 85, 86, 95, 96 selection circuit 102 CFB creation circuit 105, 123 mode selection circuit 111 NTSC mode CNB creation circuit 112 NTSC mode CDB creation circuit 113 NTSC mode shift register 114 NTSC mode drive timing generation circuit 115 PAL mode CNB creation circuit 116 PAL mode CDB creation circuit 117 PAL mode shift register 118 PAL mode drive timing generation circuit 124 Mode selection switch 132 Timing synchronization circuit 133 , 134 Frequency divider 135, 136, 137 CDB creation circuit

Claims (4)

[Claims] 1. A liquid crystal display system comprising: a liquid crystal display unit; a plurality of types of receiving units that are detachably attached to the liquid crystal display unit to supply at least display data; and an IC unit. The unit includes a liquid crystal display panel, a drive circuit for driving the liquid crystal display panel, the type of the mounted receiving unit or IC unit, and the type of the receiving unit or IC unit corresponding to the type. A liquid crystal display system comprising: a control unit that controls driving of a liquid crystal display panel via a drive circuit. 2. One of the receiving units is a tuner unit for receiving TV radio waves, which receives TV radio waves of a predetermined broadcasting system and outputs the video data as display data to the liquid crystal display unit. The liquid crystal display system according to claim 1, further comprising: a unit, and a drive control unit that generates a display drive signal for driving the liquid crystal display unit based on a television radio wave received by the receiving unit. . 3. The drive control unit includes a thinning processing unit that performs thinning processing of scanning lines of the liquid crystal display panel according to the specifications of the liquid crystal display unit and the broadcasting system received by the receiving unit. The liquid crystal display system according to claim 1 or 2. 4. The IC unit is a game unit that stores a game program and display data of the game, and the control unit of the liquid crystal display unit, when the IC unit is attached, the game program of the game unit. 2. The liquid crystal display system according to claim 1, wherein the display circuit of the game is displayed on the liquid crystal display panel by driving the drive circuit based on the above.